Boiler-tube cleaner.



C. F. LUMB. BOILER TUBE CLEANER. APPLICATION FILED 001218, 1913 PatentedDec. 15, 1914.

G. F. LUMB. BOILER TUBE CLEANER. APPLICATION FILED 0011s. 1913.

. Patented Dec. 15, 1914.

UNTTED iiTrhThfi PATENT @FFTQE.

CHAR-LES FLETCHER LUMB, OF LONDON, ENGLAND.

BOILER-TUBE CLEANER.

Application filed October 18, 1913.

To all "whom it ma concern Be it known t at l, CHARLES-'FLE'IGHER LUMB,subject of the King of Great Britain and. Ireland, residing at HornsbyHouse, Queen Victoria street, in the county of London, E. (1,- England,have-invented certain new and useful Improvements in Boiler- TubeCleaners, of which the following is a specification.

This invention relates to boiler tube cleaners of the type having amovable nozzle adapted to deliver a jet of steam or air or other fluidunder pressure through the smoke tubes in succession and has for itsobject an improved tube cleaner for use more especially with returntubeboilers and adapted normally to be housed within one of the tubes and beextended forward into the combustion chamber, and that can be installedwithout cutting the shell of the boiler and that shall direct the jet orfluid in the same direction as the furnace gases are flowing. Thearrangement is such that when the steam is turned on and the nozzlerotated and moved forward it directs a jet or" steam or the like overthe whole surface of the tube plate.

A boiler tube cleaner according to this invention is adapted to beoperated by fluid pressure and consists of a steam tube, a nozzle tubetelescoping in the steam tube so that the nozzle tube and nozzle can bewithdrawn from the combustion chamber for protection and a nozzle withjets inclined to the tube so that the whole area of the tube plate ofthe boiler being cleaned can be exposed to the action of the jets bytelescoping and rotating the nozzle tube. The steam pipe is provided atits forward end with a gland ring that packs the telescoping tube andcloses the forward portion of the boiler tube. A collar on the steamtube closes the rear portion of the boiler tube. A projection on thesteam tube engages a thread on.

the nozzle tube so that as the nozzle tube is rotated it is telescopedforward or backward in the steam tube.

lVhen in action the nozzle tube is rotated first in one direction andthen in the other and is thus as it is rotated moved away from andtoward the tubes and causes a jet of steam, air, or other ressure fluidto traverse over the whole sur ace of the tube plate so that it acts onall the tubes in succession.

Specification of Letters Patent.

Patented Dec. 15, 1914.

Serial No. 795,893.

and blows the soot and other matter from the tubes toward the fine.

In the accompanying two sheets of drawings: Figure 1 is a longitudinalsection of a tube cleaner constructed according to this invention andshown in its inoperative position in the smoke tube. Fig. 2 is a detailview of the nozzle tube and nozzle, Fig. 3 is a sectional. view of partor" a return tube boiler showing in full and interrupted lines the tubecleaner in the extreme operative positions.

The nozzle tube Z) is mounted to slide telescopically within the steamtube 0 and is provided with a helical or screw thread 7) engaging aprojection c secured on the inner surface of the steam pipe 0, so thatas the nozzle tube his rotated it also advances from or retreats withinthe steam tube 0 so that it forms a rigid whole with the nozzle tube.

The steam nozzle which has two oblique steam openings at arranged atabout 45 to the axis of the nozzle and in the example shown directedbackward is screwed on the end of the nozzle tube 5 and secured by a nutlock 6'. The steam pipe is housed in one of the tubes in the nest to becleaned by the ap- -paratus,i preferably the center tube (Z as seen inFig. 3 and extends rearwardly into the smoke chamber c where it isconnected to a steam supply pipe 7'. At its forward end the steam pipecarries a gland ring 0 and at its rear end a collar 0 by means of whichit is arranged centrally within the smoke tube (Z and which practicallyclose the smoke tube. The rotation of the nozzle a is ellected by aspindle g passing through a gland h in the rear end of the steam pipe 0and having a squared portion 9 engaging a square aperture b in the rearend of the nozzle tube 7). The spindle passes through the smoke chamher6 in a protecting tube 9 and through the smoke chamber door 6 where itis provided with a hand wheel 72..

In operation the steam is turned on and the hand Wheel rotated, in theforward direction causing: the nozzle and nozzle tube to be rotated andmoved gradually forward into the combustion chamber, causing" jets ofsteam to traverse in a spiral course over the whole surface of the tubeplate and into all the tubes in succession. The rotation of the handwheel 7:. may then be reversed when the action takes place, but in thereverse CilleCtlOIL What I claim and desire to secure by Let ters Patentis z 1. A, fluid pressure boiler tube cleaner comprising in combination,a steam tube adapted to be disposed Within a boiler tube, a nozzle tuberotatably mounted Within said steamtube means whereby said nozzle tubeis moved progressively or -retrogressively with respect to said steamtube when said nozzle tube isrotated in one direction or the other, andmeans for forming a steam-tight joint between said boiler tube and steamtube. I

2. A fluid pressure boiler tube cleaner couuarising in combination, asteam tube adapted to be disposed Within a boiler tube, a nozzle tuberotatably mounted Within said steam tube, means whereby said nozzle tubeis moved progressively or retrogressively with respect to said steamtube when said nozzle tube is rotated in one direction or the other,means for rotating said nozzle tube, and means for forming a steam-tightjoint between said boiler tube and steam tube.

8. A fluid pressure boiler tube cleaner,

comprising in combination, a steam tube adapted to be disposed Within aboiler tube, a nozzle tube rotatably mounted Within said steam tube, aspiral element disposed on the surface of said nozzle tube, a projectionon the inner surface of said steam tube and adapted to engage the saidspiral element whereby the said nozzle tube is moved progressirely orretrogressively upon the rota- CHARLES FLETCHER LUM B.

d itnesses' 3. J. WORTH,

F. lVniLmirs.

